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Finding the Fourth Proportional to 3,375.90, 4,656.87 and 1,978.38

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Solution

The fourth proportional to 3,375.90, 4,656.87 and 1,978.38 is: 2,729.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,375.90 : 4,656.87 = 1,978.38 : x
  2. Step 2: Convert to fraction form
    3,375.90/4,656.87 = 1,978.38/x
  3. Step 3: Cross multiply
    3,375.90x = 4,656.87 × 1,978.38
  4. Step 4: Simplify right side
    3,375.90x = 9,213,058.47
  5. Step 5: Solve for x
    x = 9,213,058.47/3,375.90
  6. Step 6: Final answer
    x = 2,729.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.